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COMMENTS
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See A210109 for further information.
Row sums of the following table which shows how many words of length n over a 4-letter alphabet are 3-divided in k>=1 different ways:
4;
41, 14, 5;
147, 111, 67, 29, 14, 6;
594, 358, 381, 211, 156, 128, 80, 28, 17, 7;
2072, 1400, 1433, 875, 821, 669, 588, 369, 340, 240, 163, 72, 33, 20, 8;
- R. J. Mathar, Mar 25 2012
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